Onboard mic problems. On op 1 field

Mic went from being ok to losing its power and even if i talk loudly up front snd close to it u can barely hear it, but the ui reacts the the mic levels when i tap it with my finger so its working but not properly. The unit has been used for 4 months only and its kinda frustrating that the mic went off, the thing hasnt left my desk and i tske care of it very much…bummed out and looking for solutions